My Californicator friends tell me that this can be gotten around by
using an engine that has a "service replacement block" or one with no
factory VIN, such as one from a non-automotive application. Some
engines can be made into a "SRB" with skillful application of a die
grinder, not that I would advocate that of course. Detroit Diesels
have the name plate on the rocker box cover, which gets lost a lot
when you have it chromed. (Not that any Jeep vehicle would be a
suitable for a screamer-I don't think a Grand Wagoneer could handle a
3-53 or 4-53.)